Answer:
Loss of 14250 RS if you meant he bought 40 books for RS 16000
and Profit of 150 RS if you meant he bought 40 books for RS 1600
Step-by-step explanation:
Saroj bought 40 books for 16000 RS
He sold 10 books for 40 RS each, 10*40 = 400, 400 RS for 10 books
He sold the rest (30 books) for 45 RS each, 30*45 = 1350
1350+400 = 1750
16000-1750 = 14250, he had a loss of 14250 and if you meant he bought 40 books for RS 1600 then he has a profit of 150 RS.